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<http://mashable.com/media/ZgkyMDEzLzAyLzE5L2E3L2ludGVyZXN0aW5nLjg1ZWY2LmpwZwpwCXRodW1iCTEyMDB4NjI3Iw/443c48c9/62b/interesting-math.jpg>
<http://mashable.com/2013/02/19/8-cool-applications-math/>